Jaco Geuchies
Assistant professor
- Name
- Dr. J.J. Geuchies
- Telephone
- +31 71 527 2727
- j.j.geuchies@lic.leidenuniv.nl
- ORCID iD
- 0000-0002-0758-9140
Jaco Geuchies uses advanced (nonlinear) spectroscopic techniques to study the flow of energy, electrons and heat through various kinds of materials, ranging from colloidal nanocrystals (also known as quantum dots) to metal-halide perovskites and electrochemical systems. By creating ultrafast snapshots of the fundamental processes that govern the flow of energy, he aims to rationally manipulate materials to enhance their functionality in energy-related applications.
Biography
For his bachelors degree, Jaco Geuchies studied chemistry at the Hogeschool Utrecht, followed by a master's degree in Chemistry & Physics: Nanomaterials at Utrecht University.
He wrote a proposal to fund his own PhD, which allowed him to set up a collaboration between Utrecht University and the European Synchrotron Radiation Facility (ESRF) in Grenoble, France, where he lived for a full year. Under the supervision of Prof. Daniel Vanmaekelbergh, Dr. Andrei Petukhov and Dr. Oleg Konovalov, he studied the self-assembly of PbSe nanocrystals at liquid-air interfaces, using a variety of X-ray scattering techniques at the ESRF.
He thoroughly enjoyed working with quantum-dots, and joined the group of Prof. Arjan Houtepen at Delft University of Technology. Here, he dived into the world of ultrafast spectroelectrochemistry (the combination of electrochemistry with fs laser spectroscopy), which he used to convert these quantum dots into extremely efficient light-amplifiers for lasing applications.
After diving into the world of fast spectroscopy in Delft, and being fascinated by many different nonlinear spectroscopic techniques which scientist developed around the globe, he joined the department for Molecular Spectroscopy at the Max Planck Institute for Polymer Research in Mainz, Germany, funded by the Alexander von Humboldt foundation. Working together with Prof. Mischa Bonn and Dr. Heejae Kim, he developed new multidimensional spectroscopic techniques in the THz frequency range. He used a plethora of ultrafast laser spectroscopies to study the interplay between electrons and lattice vibrations in metal-halide perovskite materials.
In his new position at Leiden University, he aims to combine knowledge on advanced materials development and ultrafast laser spectroscopy to study exciting materials related to energy-applications, and of course pass this on to a new generation of enthusiastic scientists.
Curriculum Vitae
Personal information
Nationality: Dutch
Date of birth: 27 January 1990
Education
2013 - 2017 PhD, ondensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, the Netherlands/European Synchrotron Radiation Facility (ESRF), Grenoble, France.
Thesis title: “Connecting the dots: shedding light on the self-assembly of semiconductor nanocrystals with synchrotron X-ray scattering techniques”
Advisors: Prof. Daniel Vanmaekelbergh (UU), Dr. Andrei Petukhov (UU), Dr. Oleg Konovalov (ESRF)
2011 - 2013 MSc Chemistry and Physics: Nanomaterials, Debye Institute for Nanomaterials Science, Utrecht University, the Netherlands (cum laude).
2007 - 2011 BSc Chemistry, Hogeschool Utrecht and Utrecht University, the Netherlands (cum laude).
Current and previous research positions
2024 – now Assistant Professor, Leiden Institute of Chemistry, Leiden University, The Netherlands
2021 – 2024 Alexander von Humboldt postdoctoral fellow, Molecular Spectroscopy department, Max Planck Institute for Polymer Research, Mainz, Germany (Prof. Mischa Bonn and Dr. Heejae Kim).
2017 – 2020 Postdoctoral researcher, Optoelectronic Materials section, Chemical Engineering department, Delft University of Technology, the Netherlands (Prof. Arjan Houtepen).
Grants, awards, recognitions since 2016
2021 Alexander von Humboldt fellowship (75 k€)
2013 NWO/ESRF graduate program PhD grant (250 k€)
(Co)proposer of many synchrotron-based experiments using X-ray scattering and spectroscopy (>10 proposals for various amounts of beamtime) and obtained funding for advanced electron-microscopy time through a European Soft Matter Infrastructure program (5 days).
Assistant professor
- Science
- Leiden Institute of Chemistry
- LIC/Energy & Sustainability
- LIC/ES/Catalysis and Surface Chemistry
- Chen S., Al-Hilfi S.H., Chen G., Zhang H., Zheng W., Virgilio L. Di, Geuchies J.J., Wang J., Feng X., Riedinger A., Bonn M. & Wang H.I. (2024), Tuning the inter-nanoplatelet distance and coupling strength by thermally induced ligand decomposition, Small 20(16): 2308951.
- Di Virgilio L., Geuchies J.J., Kim H., Krewer K., Wang H., Grechko M. & Bonn M. (2023), Controlling the electro-optic response of a semiconducting perovskite coupled to a phonon-resonant cavity, Light: Science & Applications 12: 183.
- Mangnus M.J.J., Wit J.W. de, Vonk S.J.W., Geuchies J.J., Albrecht W., Bals S., Houtepen A.J. & Rabouw F.T. (2023), High-throughput characterization of single-quantum-dot emission spectra and spectral diffusion by multiparticle spectroscopy, ACS Photonics 10(8): 2688-2698.
- Zhang H., Debroye E., Fu S., Rodriguez Gonzalez M.C., du Fosse I., Geuchies J.J., Gao L., Yu X., Houtepen A.J., De Feyter S., Hofkens J., Bonn M. & Wang H.I. (2023), Optical switching of hole transfer in double-Perovskite/graphene heterostructure, Advanced Materials 35(29): 2211198.
- Giannini S., Di Virgilio L., Bardini M., Hausch J., Geuchies J.J., Zheng W., Volpi M., Elsner J., Broch K., Geerts Y.H., Schreiber F., Schweicher G., Wang H.I., Blumberger J., Bonn M. & Beljonne D. (2023), Transiently delocalized states enhance hole mobility in organic molecular semiconductors, Nature Materials 22(11): 1361–1369.
- Brosseau P.J., Geuchies J.J., Jasrasaria D., Houtepen A.J., Rabani E. & Kambhampati P. (2023), Ultrafast hole relaxation dynamics in quantum dots revealed by two-dimensional electronic spectroscopy, Communications Physics 6(1): 48.
- Geuchies J.J., Dijkhuizen R., Koel M., Grimaldi G., du Fosse I., Evers W.H., Hens Z. & Houtepen A.J. (2022), Zero-threshold optical gain in electrochemically doped nanoplatelets and the physics behind it, ACS Nano 16(11): 18777–18788.
- Vonk S.J.W., Heemskerk B.A.J., Keitel R.C., Hinterding S.O.M., Geuchies J.J., Houtepen A.J. & Rabouw F.T. (2021), Biexciton binding energy and line width of single quantum dots at room temperature, Nano Letters 21(13): 5760-5766.
- Prins P.T., Montanarella F., Dumbgen K., Justo Y., Bok J.C. van der, Hinterding S.O.M., Geuchies J.J., Maes J., De Nolf K., Deelen S., Meijer H., Zinn T., Petukhov A.V., Rabouw F.T., De Mello Donega C., Vanmaekelbergh D. & Hens Z. (2021), Extended nucleation and superfocusing in colloidal semiconductor nanocrystal synthesis, Nano Letters 21(6): 2487-2496.
- Burgt J.S. van der, Dieleman C.D., Johlin E., Geuchies J.J., Houtepen A.J., Ehrler B. & Garnett E.C. (2021), Integrating sphere Fourier microscopy of highly directional emission, ACS Photonics 8(4): 1143-1151.
- Geuchies J.J., Brynjarsson B., Grimaldi G., Gudjonsdottir S., Stam W. van der, Evers W.H. & Houtepen A.J. (2021), Quantitative electrochemical control over optical gain in quantum-dot solids, ACS Nano 15(1): 377-386.
- Kirkwood N., De Backer A., Altantzis T., Winckelmans N., Longo A., Antolinez F.V., Rabouw F.T., De Trizio L., Geuchies J.J., Mulder J.T., Renaud N., Bals S., Manna L. & Houtepen A.J. (2020), Locating and controlling the Zn content in In(Zn)P quantum dots, Chemistry of Materials 32(1): 557-565.
- Geuchies J.J., Soligno G., Geraffy E., Hendrikx C.P., Overbeek C. van, Montanarella F., Slot M.R., Konovalov O.V., Petukhov A.V. & Vanmaekelbergh D. (2020), Unravelling three-dimensional adsorption geometries of PbSe nanocrystal monolayers at a liquid-air interface, Communications Chemistry 3: 28.
- Stam W. van der, Grimaldi G., Geuchies J.J., Gudjonsdottir S., Uffelen P.T. van, Overeem M. van, Brynjarsson B., Kirkwood N. & Houtepen A.J. (2019), Electrochemical modulation of the photophysics of surface-localized trap states in core/shell/(shell) quantum dot films, Chemistry of Materials 31(20): 8484-8493.
- Grimaldi G., Brom M.J. van den, du Fosse I., Crisp R.W., Kirkwood N., Gudjonsdottir S., Geuchies J.J., Kinge S., Siebbeles L.D.A. & Houtepen A.J. (2019), Engineering the band alignment in QD heterojunction films via ligand exchange, Journal of Physical Chemistry C 123(49): 29599-29608.
- Grimaldi G., Geuchies J.J., Stam W. van der, du Fosse I., Brynjarsson B., Kirkwood N., Kinge S., Siebbeles L.D.A. & Houtepen A.J. (2019), Spectroscopic evidence for the contribution of holes to the bleach of Cd-chalcogenide quantum dots, Nano Letters 19(5): 3002-3010.
- Montanarella F., Geuchies J.J., Dasgupta T., Prins P.T., Overbeek Carlo van, Dattani R., Baesjou P., Dijkstra M., Petukhov A.V, Blaaderen A. van & Vanmaekelbergh D. (2018), Crystallization of nanocrystals in spherical confinement probed by in situ X-ray scattering, Nano Letters 18(6): 3675-3681.
- Burgt J.S. van der, Geuchies J.J., Meer Berend van der, Vanrompay H., Zanaga D., Zhang Y., Albrecht W., Petukhov A.V., Filion L., Bals S., Swart I. & Vanmaekelbergh D. (2018), Cuboidal supraparticles self-assembled from cubic CsPbBr3 perovskite nanocrystals, Journal of Physical Chemistry C 122(27): 15706-15712.
- Stam W. van der, Graaf M. de, Gudjonsdottir S., Geuchies J.J., Dijkema J.J., Kirkwood N., Evers W.H., Longo A. & Houtepen A.J. (2018), Tuning and probing the distribution of Cu+ and Cu2+ trap states responsible for broad-band photoluminescence in CuInS2 nanocrystals, ACS Nano 12(11): 11244-11253.
- Stam W. van der, Geuchies J.J., Altantzis T., Bos K.H.W. van den, Meeldijk J.D., Van Aert S., Bals S., Vanmaekelbergh D. & de Mello Donega C. (2017), Highly emissive divalent-ion-doped colloidal CsPb1-xMxBr3 perovskite nanocrystals through cation exchange, Journal of the American Chemical Society 139(11): 4087-4097.
- Iaru C.M., Geuchies J.J., Koenraad P.M., Vanmaekelbergh D. & Silov A.Y. (2017), Strong carrier-phonon coupling in lead halide perovskite nanocrystals, ACS Nano 11(11): 11024-11030.
- Geuchies J.J., Overbeek C. van, Evers W.H., Goris B., Backer A. de, Gantapra A.P., Rabout F.T., Hilhorst J., Peters J.L., Konavalov O., Petukhov A.V., Dijkstra M., Siebbeles L.D.A., Aerts S. van, Bals S. & Vanmaekelbergh D. (2016), In situ study of the formation mechanism of two-dimensional superlattices from PbSe nanocrystals, Nature Materials 15(12): 1248-1254.
- Stam W. van der, Rabouw F.T., Geuchies J.J., Berends A.C., Hinterding S.O.M., Geitenbeek R.G., Lit J. van der, Prevost S., Petukhov A.V. & de Mello Donega C. (2016), In situ probing of stack-templated growth of ultrathin Cu2-xS nanosheets, Chemistry of Materials 28(17): 6381-6389.
- Stam W. van der, Rabouw F.T., Vonk S.J.W., Geuchies J.J., Ligthart H., Petukhov A.V. & de Mello Donega C. (2016), Oleic acid-induced atomic alignment of ZnS polyhedral nanocrystals, Nano Letters 16(4): 2608-2614.
- Boneschanscher M.P., Evers W.H., Geuchies J.J., Altantzis T., Goris B., Rabouw F.T., Rossum S.A.P. van, Zant H.S.J. van der, Siebbeles L.D.A., Tendeloo G. van, Swart I., Hilhorst J., Petukhov A.V., Bals S. & Vanmaekelbergh D. (2014), Long-range orientation and atomic attachment of nanocrystals in 2D honeycomb superlattices, Science 344(6190): 1377-1380.